INTERXION TO BUILD EIGHTH DATA CENTRE IN FRANKFURT

AMSTERDAM 30 May 2013. INTERXION HOLDING NV (NYSE:INXN, news), a leading European provider of carrier and cloud neutral colocation data centre services, today announced that it will construct its eighth data centre in Frankfurt (“FRA 8”). The new data center is in response to continued demand from customers seeking to benefit from Interxion’s Connectivity Hub, which contains over 150 directly popped carriers and Internet Service Providers (ISP”) as well as the core node for DE-CIX with its over 450 carrier and ISP connections. FRA 8 will be built in four phases, with each phase providing approximately 900 square meters of equipped space, and will be located on land owned by Interxion within its existing campus. Interxion has secured 6 MW of additional customer available power for FRA 8. The first phase is scheduled to be operational in the first half of 2014; the second phase is scheduled to be operational in 2015.

David Ruberg, Interxion’s Chief Executive Officer said: “The consistent demand we are experiencing in the Frankfurt market is driven by cloud service providers, digital media, and financial services customers attracted to our vibrant Connectivity Hub. We are prudently allocating capital in phases to respond to this demand from our communities of interest while maximising returns.”

The capital expenditure associated with the site preparation and the first two phases of FRA 8 is approximately €30 million. The anticipated spend in 2013 is included in the 2013 annual capital expenditure guidance previously provided by the Company.

About Interxion
Interxion (NYSE: INXN) is a leading provider of carrier and cloud neutral colocation data centre services in Europe: it serves a wide range of customers through 34 data centres in 11 European countries. Interxion’s uniformly designed, energy-efficient data centres offer customers extensive security and uptime for their mission-critical applications. With connectivity provided by more than 450 fixed and mobile carriers and ISPs, and 18 European Internet exchanges, Interxion has created cloud, content, finance and connectivity hubs that foster growing customer communities of interest. For more information, please visit www.interxion.com.

Forward-looking statements

This press release contains forward-looking statements that involve risks and uncertainties. Actual results may differ materially from expectations discussed in such forward-looking statements. Factors that might cause such differences include, but are not limited to, the difficulty of reducing operating expenses in the short term, inability to utilise the capacity of newly planned data centres and data centre expansions, construction delays with respect to newly planned data centres and data centre expansions, significant competition, the cost and supply of electrical power, data centre industry over-capacity, performance under service-level agreements, and other risks described from time to time in Interxion's filings with the Securities and Exchange Commission. Estimates of capital expenditure and equipped space are approximate and may change. Capital expenditure reflects the total for the listed project at full power and capacity and may not be all invested in the current year. Interxion does not assume any obligation to update the forward-looking information contained in this press release.